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AssemblyAI vs Cartesia: catalog facts
AssemblyAI	Cartesia
Paid Commercial API service; see the site for current rates.	Paid Plans are listed on the pricing page, with a sales contact for larger deployments.
Web	Web
Realtime and pre-recorded transcription in 99 languages Speech understanding and dictation APIs alongside transcription	One API covers text-to-speech, transcription and voice agents Built for low-latency, real-time conversation
Built for developers, not a ready-made transcription app Cloud API by default	Mainly an API for developers rather than a consumer app Cloud only, with no local option
Hosted service	Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.